Crayons are made from colored wax that can melt if it gets too warm.
That is why crayons go soft on a hot day. When they cool down, they turn hard again.
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A pencil writes with a soft grey material called graphite, not lead.
An eraser makes tiny crumbs that lift pencil marks right off the paper.
Most pencils have six flat sides so they don't roll off the desk.
Paper is made from trees that are turned into soft, mushy pulp.
One pencil can draw a line about 55 kilometres long.